Bind an event handler and fire it immediately

jquery.ba-bindandtrigger.js

/*!
 * bindAndTrigger - v0.1 - 04/30/2010
 * http://benalman.com/
 * 
 * http://jsfiddle.net/cowboy/fJnA2/
 */

(function($,undefined){
  
  $.fn.bindAndTrigger = function( all, type, data, callback ) {
    if ( typeof all !== 'boolean' ) {
      callback = data;
      data = type;
      type = all;
      all = undefined;
    }
    
    var first = type.split(' ')[0],
      fn = callback || data;
    
    return this
      .bind( type, data, callback )
      .each(function(){
        var event = $.Event( first );
        fn.call( event.target = this, event );
        return !!all;
      });
  };
  
})(jQuery);

I used to have a lot of fancy arguments stuff in jQuery Object Utils (predecessor to jQuery getObject) but it ended up being a bit gross. In this particular example, it actually simplified things greatly (imo) to use explicit vars.

One or two if statements to shift args around might not feel beautiful, but it minifies really small and executes super-fast.